Checklist of Benthic Cnidaria in the SW Atlantic Ocean (54 ºS- 56 ºS) Author Schejter, L. 0000-0001-5443-4048 Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP). Paseo Victoria Ocampo 1, 7600, Mar del Plata, Argentina. Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas, Mar del Plata, Argentina. & schejter @ inidep. edu. ar, https: // orcid. org / 0000 - 0001 - 5443 - 4048 Author Genzano, G. 0000-0002-9818-7648 genzano @ mdp. edu. ar; https: // orcid. org / 0000 - 0002 - 9818 - 7648 genzano@mdp.edu.ar Author Pérez, C. D. 0000-0002-0866-1183 Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua Alto do Reservatório s / n, Bela Vista, CEP: 55608 - 680, Vitória de Santo Antão-PE, Brazil. & carlos. perez @ ufpe. br, https: // orcid. org / 0000 - 0002 - 0866 - 1183 Author Acuña, F. Estación Científica Coiba (Coiba-AIP), Clayton, Panamá, República de Panamá. Author Cordeiro, R. T. S. 0000-0002-3164-5333 Departamento de Biologia, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros, s / n, Dois Irmãos, CEP: 52171 - 900, Recife / PE, Brazil. & Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA ralfts @ gmail. com; https: // orcid. org / 0000 - 0002 - 3164 - 5333 ralfts@gmail.com Author Silva, R. A. Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua Alto do Reservatório s / n, Bela Vista, CEP: 55608 - 680, Vitória de Santo Antão-PE, Brazil. Author Garese, A. Author Bremec, C. S. text Zootaxa 2020 2020-11-13 4878 2 201 239 journal article 7936 10.11646/zootaxa.4878.2.1 b10a81a2-3936-425a-92b6-9e52fd7be1e7 1175-5326 4424884 F930E674-DDA9-4EC9-B0E9-3891B239C6CF Primnoella scotiae Thomson & Ritchie, 1906 Material examined: BBB 2016: St. 12; St. 13; St. 21; St. 28; St. 23; St. 26; St. 27; St. 32; St. 34; St. 38; St. 40. PD BB 2017: St. 5; St. 14; St. 16; St. 21; St. 23; St. 28; St. 30; St. 34; St. 35. GARCÍA 2015: St. 17bis ( Fig. 2I ) (MACN-In: 43505, 43506, 43507, 43508, 43509, 43510, 43511, 43512). Distribution: Mar del Plata ( 37º36’S , 54º46’W , 740 m ) ( Argentina ) ( Tixier-Durivault 1969 –70 as Primnoella compressa ); off of Río de la Plata ( Uruguay ) ( 35°30’S , 52°50’W , 35°03’S , 52°45’W , 196–263 m ) and Tierra del Fuego ( Argentina ) ( 54°23’S , 65°42’W , 164 m ) ( Pérez & Zamponi 2004 as P. compressa ); Burdwood bank ( 54°25’S , 57°32’W , 95 m ) ( Thomson & Ritchie 1906 ); Iquique, Chile ( Kükenthal 1919 , as P. compressa ); South Orkney Islands ( 60°14’30”S , 45°13’80”W, 8–12 m ) ( Peck & Brockington 2013 ); Off Chubut , Argentina ( Patiño Cano 2013 ); off Staten Is., Burdwood bank ( 90–785 m ) (present study). Remarks: A recent study included this species in the feeding preferences of the nudibranch Tritonia odhneri ( García-Matucheski & Muniain 2011 ) ; a second had addressed its growth and included it as prey for the sea anemone Dactylanthus antarcticus ( Peck & Brockington 2013 ) . Several colonies presented epibionts like hydroids, bryozoans and ophiuroids. It was frequent in several stations of the current study and it is likely to be among those forming recently found pristine gorgonian habitats in Antarctic continental shelf ( Ambroso et al. 2017 ; Schejter et al . 2020 ).